4 * Basic symbol and namespace definitions.
6 * Copyright (C) 2003 Transmeta Corp.
9 * Licensed under the Open Software License version 1.1
15 * An identifier with semantic meaning is a "symbol".
17 * There's a 1:n relationship: each symbol is always
18 * associated with one identifier, while each identifier
19 * can have one or more semantic meanings due to C scope
22 * The progression is symbol -> token -> identifier. The
23 * token contains the information on where the symbol was
30 NS_STRUCT
= 4, // Also used for unions and enums.
62 KW_SPECIFIER
= 1 << 0,
64 KW_QUALIFIER
= 1 << 2,
65 KW_ATTRIBUTE
= 1 << 3,
67 KW_STATEMENT
= 1 << 5,
71 struct expression
*context
;
75 extern struct context
*alloc_context(void);
77 DECLARE_PTR_LIST(context_list
, struct context
);
80 unsigned long modifiers
;
81 unsigned long alignment
;
82 struct context_list
*contexts
;
84 struct symbol
*base_type
;
89 int (*evaluate
)(struct expression
*);
90 int (*expand
)(struct expression
*, int);
91 int (*args
)(struct expression
*);
94 struct token
*(*declarator
)(struct token
*token
, struct ctype
*ctype
);
95 struct token
*(*statement
)(struct token
*token
, struct statement
*stmt
);
96 struct token
*(*toplevel
)(struct token
*token
, struct symbol_list
**list
);
99 extern int expand_safe_p(struct expression
*expr
, int cost
);
100 extern int expand_constant_p(struct expression
*expr
, int cost
);
102 #define SYM_ATTR_WEAK 0
103 #define SYM_ATTR_NORMAL 1
104 #define SYM_ATTR_STRONG 2
108 enum namespace namespace:9;
109 unsigned char used
:1, attr
:2;
110 struct position pos
; /* Where this symbol was declared */
111 struct ident
*ident
; /* What identifier this symbol is associated with */
112 struct symbol
*next_id
; /* Next semantic symbol that shares this identifier */
113 struct symbol
**id_list
; /* Backpointer to symbol list head */
114 struct symbol
*replace
; /* What is this symbol shadowed by in copy-expression */
116 struct symbol
*same_symbol
;
117 struct symbol_op
*op
;
120 struct /* NS_MACRO */ {
121 struct token
*expansion
;
122 struct token
*arglist
;
123 struct scope
*used_in
;
125 struct /* NS_PREPROCESSOR */ {
126 int (*handler
)(struct stream
*, struct token
**, struct token
*);
129 struct /* NS_SYMBOL */ {
130 unsigned long offset
;
132 unsigned int bit_offset
:8,
140 struct expression
*array_size
;
142 struct symbol_list
*arguments
;
143 struct statement
*stmt
;
144 struct symbol_list
*symbol_list
;
145 struct statement
*inline_stmt
;
146 struct symbol_list
*inline_symbol_list
;
147 struct expression
*initializer
;
148 long long value
; /* Initial value */
151 union /* backend */ {
152 struct basic_block
*bb_target
; /* label */
153 void *aux
; /* Auxiliary info, eg. backend information */
154 struct { /* sparse ctags */
156 unsigned char visited
:1;
163 #define MOD_AUTO 0x0001
164 #define MOD_REGISTER 0x0002
165 #define MOD_STATIC 0x0004
166 #define MOD_EXTERN 0x0008
168 #define MOD_CONST 0x0010
169 #define MOD_VOLATILE 0x0020
170 #define MOD_SIGNED 0x0040
171 #define MOD_UNSIGNED 0x0080
173 #define MOD_CHAR 0x0100
174 #define MOD_SHORT 0x0200
175 #define MOD_LONG 0x0400
176 #define MOD_LONGLONG 0x0800
178 #define MOD_TYPEDEF 0x1000
180 #define MOD_INLINE 0x40000
181 #define MOD_ADDRESSABLE 0x80000
183 #define MOD_NOCAST 0x100000
184 #define MOD_NODEREF 0x200000
185 #define MOD_ACCESSED 0x400000
186 #define MOD_TOPLEVEL 0x800000 // scoping..
188 #define MOD_LABEL 0x1000000
189 #define MOD_ASSIGNED 0x2000000
190 #define MOD_TYPE 0x4000000
191 #define MOD_SAFE 0x8000000 // non-null/non-trapping pointer
193 #define MOD_USERTYPE 0x10000000
194 #define MOD_FORCE 0x20000000
195 #define MOD_EXPLICITLY_SIGNED 0x40000000
196 #define MOD_BITWISE 0x80000000
198 #define MOD_NONLOCAL (MOD_EXTERN | MOD_TOPLEVEL)
199 #define MOD_STORAGE (MOD_AUTO | MOD_REGISTER | MOD_STATIC | MOD_EXTERN | MOD_INLINE | MOD_TOPLEVEL)
200 #define MOD_SIGNEDNESS (MOD_SIGNED | MOD_UNSIGNED | MOD_EXPLICITLY_SIGNED)
201 #define MOD_SPECIFIER (MOD_CHAR | MOD_SHORT | MOD_LONG | MOD_LONGLONG | MOD_SIGNEDNESS)
202 #define MOD_SIZE (MOD_CHAR | MOD_SHORT | MOD_LONG | MOD_LONGLONG)
203 #define MOD_IGNORE (MOD_TOPLEVEL | MOD_STORAGE | MOD_ADDRESSABLE | \
204 MOD_ASSIGNED | MOD_USERTYPE | MOD_FORCE | MOD_ACCESSED | MOD_EXPLICITLY_SIGNED)
205 #define MOD_PTRINHERIT (MOD_VOLATILE | MOD_CONST | MOD_NODEREF | MOD_STORAGE)
208 /* Current parsing/evaluation function */
209 extern struct symbol
*current_fn
;
212 extern struct symbol int_type
,
216 extern struct symbol bool_ctype
, void_ctype
, type_ctype
,
217 char_ctype
, schar_ctype
, uchar_ctype
,
218 short_ctype
, sshort_ctype
, ushort_ctype
,
219 int_ctype
, sint_ctype
, uint_ctype
,
220 long_ctype
, slong_ctype
, ulong_ctype
,
221 llong_ctype
, sllong_ctype
, ullong_ctype
,
222 float_ctype
, double_ctype
, ldouble_ctype
,
223 string_ctype
, ptr_ctype
, lazy_ptr_ctype
,
224 incomplete_ctype
, label_ctype
, bad_ctype
;
226 /* Special internal symbols */
227 extern struct symbol zero_int
;
229 #define __IDENT(n,str,res) \
230 extern struct ident n
231 #include "ident-list.h"
233 #define symbol_is_typename(sym) ((sym)->type == SYM_TYPE)
235 extern struct symbol_list
*translation_unit_used_list
;
237 extern void access_symbol(struct symbol
*);
239 extern const char * type_difference(struct symbol
*target
, struct symbol
*source
,
240 unsigned long target_mod_ignore
, unsigned long source_mod_ignore
);
242 extern struct symbol
*lookup_symbol(struct ident
*, enum namespace);
243 extern struct symbol
*create_symbol(int stream
, const char *name
, int type
, int namespace);
244 extern void init_symbols(void);
245 extern void init_ctype(void);
246 extern struct symbol
*alloc_symbol(struct position
, int type
);
247 extern void show_type(struct symbol
*);
248 extern const char *modifier_string(unsigned long mod
);
249 extern void show_symbol(struct symbol
*);
250 extern int show_symbol_expr_init(struct symbol
*sym
);
251 extern void show_type_list(struct symbol
*);
252 extern void show_symbol_list(struct symbol_list
*, const char *);
253 extern void add_symbol(struct symbol_list
**, struct symbol
*);
254 extern void bind_symbol(struct symbol
*, struct ident
*, enum namespace);
256 extern struct symbol
*examine_symbol_type(struct symbol
*);
257 extern void examine_simple_symbol_type(struct symbol
*);
258 extern const char *show_typename(struct symbol
*sym
);
259 extern const char *builtin_typename(struct symbol
*sym
);
260 extern const char *builtin_ctypename(struct ctype
*ctype
);
262 extern void debug_symbol(struct symbol
*);
263 extern void merge_type(struct symbol
*sym
, struct symbol
*base_type
);
264 extern void check_declaration(struct symbol
*sym
);
266 static inline struct symbol
*get_base_type(const struct symbol
*sym
)
268 return examine_symbol_type(sym
->ctype
.base_type
);
271 static inline int is_int_type(const struct symbol
*type
)
273 if (type
->type
== SYM_NODE
)
274 type
= type
->ctype
.base_type
;
275 if (type
->type
== SYM_ENUM
)
276 type
= type
->ctype
.base_type
;
277 return type
->type
== SYM_BITFIELD
||
278 type
->ctype
.base_type
== &int_type
;
281 static inline int is_enum_type(const struct symbol
*type
)
283 if (type
->type
== SYM_NODE
)
284 type
= type
->ctype
.base_type
;
285 return (type
->type
== SYM_ENUM
);
288 static inline int get_sym_type(struct symbol
*type
)
290 if (type
->type
== SYM_NODE
)
291 type
= type
->ctype
.base_type
;
292 if (type
->type
== SYM_ENUM
)
293 type
= type
->ctype
.base_type
;
297 static inline struct symbol
*lookup_keyword(struct ident
*ident
, enum namespace ns
)
301 return lookup_symbol(ident
, ns
);
304 #define is_restricted_type(type) (get_sym_type(type) == SYM_RESTRICT)
305 #define is_fouled_type(type) (get_sym_type(type) == SYM_FOULED)
306 #define is_bitfield_type(type) (get_sym_type(type) == SYM_BITFIELD)
307 extern int is_ptr_type(struct symbol
*);
309 void create_fouled(struct symbol
*type
);
310 struct symbol
*befoul(struct symbol
*type
);
312 #endif /* SYMBOL_H */